[PATCH v2 2/2] pinctrl: mvebu: make pdma clock on dove mandatory

[Sebastian Hesselbarth]

With the ability to pass clocks through DT, now make the pdma
clock of dove pinctrl mandatory. Otherwise, pinctrl will hang
the system when accessing some registers.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth at gmail.com>
---
v1->v2:
- propagate error of devm_clk_get as suggested by Baruch Siach

Cc: Jason Cooper <jason at lakedaemon.net>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth at gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
Cc: Andrew Lunn <andrew at lunn.ch>
Cc: Gregory CLEMENT <gregory.clement at free-electrons.com>
Cc: Axel Lin <axel.lin at ingics.com>
Cc: Linus Walleij <linus.walleij at linaro.org>
Cc: Russell King <linux at arm.linux.org.uk>
Cc: linux-kernel at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
---
 drivers/pinctrl/mvebu/pinctrl-dove.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/mvebu/pinctrl-dove.c b/drivers/pinctrl/mvebu/pinctrl-dove.c
index 40c9c3e..9cc219f 100644
--- a/drivers/pinctrl/mvebu/pinctrl-dove.c
+++ b/drivers/pinctrl/mvebu/pinctrl-dove.c
@@ -595,8 +595,11 @@ static int __devinit dove_pinctrl_probe(struct platform_device *pdev)
 	 * grab clk to make sure it is ticking.
 	 */
 	clk = devm_clk_get(&pdev->dev, NULL);
-	if (!IS_ERR(clk))
-		clk_prepare_enable(clk);
+	if (IS_ERR(clk)) {
+		dev_err(&pdev->dev, "Unable to get pdma clock");
+		return PTR_RET(clk);
+	}
+	clk_prepare_enable(clk);
 
 	return mvebu_pinctrl_probe(pdev);
 }
-- 
1.7.10.4